Book Image

Android UI Development with Jetpack Compose

By : Thomas Künneth
Book Image

Android UI Development with Jetpack Compose

By: Thomas Künneth

Overview of this book

Jetpack Compose is Android’s new framework for building fast, beautiful, and reliable native user interfaces. It simplifies and significantly accelerates UI development on Android using the declarative approach. This book will help developers to get hands-on with Jetpack Compose and adopt a modern way of building Android applications. The book is not an introduction to Android development, but it will build on your knowledge of how Android apps are developed. Complete with hands-on examples, this easy-to-follow guide will get you up to speed with the fundamentals of Jetpack Compose such as state hoisting, unidirectional data flow, and composition over inheritance and help you build your own Android apps using Compose. You'll also cover concepts such as testing, animation, and interoperability with the existing Android UI toolkit. By the end of the book, you'll be able to write your own Android apps using Jetpack Compose.
Table of Contents (16 chapters)
Part 1:Fundamentals of Jetpack Compose
Part 2:Building User Interfaces
Part 3:Advanced Topics

Understanding the single measure pass

Laying out a UI element hierarchy means determining the sizes of all the elements and positioning them on the screen based on the layout strategy of their parent. At first, getting the size of, say, some text doesn't sound too complicated. After all, isn't it determined by the font and the text to be output? Here's an example, with two pieces of text laid out in a Column():

fun ColumnWithTexts() {
  Column {
      text = "Android UI development with Jetpack Compose",
      style = MaterialTheme.typography.h3
      text = "Hello Compose",
      style = MaterialTheme
          .typography.h5.merge(TextStyle(color = Color.Red))...